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Horseshoe Bay, Texas
Inside Horseshoe Bay's city limits, shrink-swell clay limits houses without basements on 10% of mapped land, the highest of 3 cities in Llano County. A shallow water table limits basements on 0%.
That clay share is below Llano County's 16%. FEMA's flood data list 146 flood losses since 2016 in ZIP code 78657 overlapping the city. Of its 3,851 homes, 16% were built before 1980; the median dates from 1995.
Data as of October 13, 2026 · sources · in Llano County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
of homes built before 1980
Foundation repair in Horseshoe Bay
Foundation repair in Horseshoe Bay: shrink-swell clay limits slab homes on 10% of Horseshoe Bay's mapped land.
About 2,300 of Horseshoe Bay's 3,851 homes are detached houses.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Horseshoe Bay city limits
| Expansive clay (limits slab homes) | 9.7% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 79.9% |
| Clay swell (LEP, by area) | 4.0% |
| High-swell land (LEP 6%+) | 6.0% |
| Mapped soil | 10,612 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Ligon | 18% | n/a |
| Eckrant | 12% | 8% |
| Click | 11% | n/a |
| Voca | 8% | n/a |
| Katemcy | 5% | n/a |
| Harper | 5% | n/a |
What the numbers mean here
USDA rates 80% of the land very limited for septic absorption fields.
With shrink-swell clay on 10% and a shallow water table on 0% of the land, the soil survey points to neither problem across most of Horseshoe Bay; conditions still vary lot by lot.
Drought in Llano County
0% of Llano County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Horseshoe Bay. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78657 | 100% | 146 | $4.8 million |
Homes in Horseshoe Bay
| Housing units | 3,851 |
| Median year built | 1995 |
| Built before 1980 | 16% |
| Built 2000 or later | 37% |
| Owner-occupied | 81% |
| Median value, owner-occupied | $549,800 |
| Single-family detached | 61% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Cottonwood Shores | 3 mi | 20% | 0% |
| Granite Shoals | 3 mi | 0% | 0% |
| Sunrise Beach Village | 4 mi | 1% | 0% |
| Highland Haven | 5 mi | 6% | 0% |
| Meadowlakes | 5 mi | 64% | 0% |
| Marble Falls | 6 mi | 44% | under 1% |
| Double Horn | 10 mi | 70% | 0% |
| Round Mountain | 10 mi | 31% | 0% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status